Abstract
The behaviour of the rare-earth elements (REE) during the weathering of granites was studied in southern Guangxi, China. Based on the study of the weathering profiles, the soil, weathered and sub-weathered zones are identified with different REE geochemical behaviours through the weathering profiles of granite. The Ce anomalies of the weathering profiles cover a large range of values with most falling between 1.02 and 1.43 in the soil zone and 0.16 and 0.40 in the weathered and sub-weathered zones. Light rare-earth elements (LREE) and heavy rare-earth elements (HREE) are enriched to varying degree in the weathering profiles as compared to host granites. In the soil zone, more HREEs are leached than LREEs, and HREEs are more enriched than LREE in the weathered and sub-weathered zones. It is considered that infiltration and adsorption on clays are two processes controlling the enrichment and formation of REE deposits in the weathering profiles of granite.
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References
Brookins, D. G., 1983, Eh-pH diagrams for REE at 25°C and 1×105 Pa pressure: Geochemical Journal, v. 17, p. 223–229.
Butt, C. R. M., 1986, Comments in discussion on “vertical distribution of trace elements in laterite soil (Suriname)”: Chemical Geology, v. 56, p. 159–160.
Cullers, R. L., S. Chuudhuri, B. Arnild, M. Lee, and L. N. Jr. Wolf, 1975, REE distributions in clay minerals and in the clay-sized fraction of the Lower Permian and Haresville and Eskridge shales of Kansas and Oklahoma: Geochim. Cosmochim. Acta, v. 29, p. 1691–1703.
Lin Chuanxian and Zheng Zuoping, 1990, Physicochemical conditions affecting the REE adsorption on clay minerals: Annual Report of Open Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, v. 1, p. 35–42 (in Chinese).
Lin Chuanxian and Zheng Zuoping, 1994, Experimental studies on the metallogenetic mechanism of weathering crust-leaching REE deposits in southern China: Geochimica, v. 23, p. 190–198 (in Chinese).
Roaldset, E., 1973, REE in Quaternary clays of the Numedal area, southern Norway: Lithos, v. 6, p. 349–372.
Roaldset, E., 1979, REE in different-size fractions of a marine quick clay from Ullensaker, and still from upper Numedal, Norway: Clay Minerals, v. 14, p. 229–240.
Sholkovits, E. R., 1992, Chemical evolution of rare-earth elements: fractionation between colloidal and solution phases of filtered river water: Earth and Planetary Science Letters, v. 114, p. 77–84.
Wang Xianjue, Song Yunhua, and Shen Lipu, 1980, An experimental investigation on the REE weathering crust of granites in South China: Scientific papers on geology prepared for the 25th International Geological Congress, v. 2, p. 139–145 (in Chinese).
Wang Zhonggang, Yu Xueyuan, and Zhao Zhenhua, 1989, Rare-Earth Element Geochemistry: Beijing, Science Press, 535p. (in Chinese)
Wu Chengyu and Guo Zhongxun, 1989, REE geochemistry in the weathering process of granites in Longnan County, Jiangxi Province: Acta Geologica Sinica, v. 63, p. 349–362 (in Chinese).
Yang Zhuming, 1987, A study on clay minerals from the REE-rich weathered crust developed on the Longnan granites in Jiangxi Province: Scientia Geologica Sinica, n. 1, p. 70–80 (in Chinese).
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This project was granted by the National Natural Science Foundation of China.
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Zuoping, Z., Chuanxian, L. The behaviour of rare-earth elements (REE) during weathering of granites in southern Guangxi, China. Chin. J. of Geochem. 15, 344–352 (1996). https://doi.org/10.1007/BF02867008
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DOI: https://doi.org/10.1007/BF02867008